It is possible that you only received your BIFI part, and not the WBNB part. This could be due to a few different reasons. It is possible that the WBNB part was not included in your order, or that it was sent to a different address. It could also be that the WBNB part was sent to you, but was lost in transit. If this is the case, you should contact the seller to confirm what happened and to make sure you receive the WBNB part. Additionally, it is possible that the WBNB part is actually BNB and not WBNB. If this is the case, you should make sure to double check the order to confirm that you received the correct part.